A&R - Dalton's atomic theory — task. Chemistry CBSE Live product, Class 9 (2026-27).

Determine the correct answer:

Assertion (A):	Atoms of all elements have the same mass.
Reason (R):	Atoms of different elements have different masses and chemical properties.

Both Assertion (A) and Reason (R) are true, and R is the correct explanation of A.
Both Assertion (A) and Reason (R) are true, but R is not the correct explanation of A.
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

Did you find an error?

3. A&R - Dalton's atomic theory